mm: do_mincore() cleanup

Two cleanups:
1. remove redundant codes for hugetlb pages.
2. end = pmd_addr_end(addr, end) restricts [addr, end) within PMD_SIZE,
   this may increase do_mincore() calls, remove it.

Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: qiuxishi <qiuxishi@huawei.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/mincore.c b/mm/mincore.c
index da2be56..1016233 100644 (file)
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -225,13 +225,6 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 
        end = min(vma->vm_end, addr + (pages << PAGE_SHIFT));
 
-       if (is_vm_hugetlb_page(vma)) {
-               mincore_hugetlb_page_range(vma, addr, end, vec);
-               return (end - addr) >> PAGE_SHIFT;
-       }
-
-       end = pmd_addr_end(addr, end);
-
        if (is_vm_hugetlb_page(vma))
                mincore_hugetlb_page_range(vma, addr, end, vec);
        else